The lactone ring is five-membered

Subclass of:

549 - Organic compounds -- part of the class 532-570 series

549000000 - ORGANIC COMPOUNDS (CLASS 532, SUBCLASS 1)

549000000 - HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM, OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS (Class 540, subclass 1)

549200000 - Oxygen containing hetero ring (e.g., dioxirane, etc.)

549263000 - Lactones (i.e., -C(=X)O-, wherein X is chalcogen, is part of the hetero ring)

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application number	Description	Number of patent applications / Date published
549297000	Polycyclo ring system having the lactone ring as one of the cyclos	44
549313000	Additional chalcogen bonded directly to the lactone ring	22
549326000	Preparing from compound containing -COO- group	21
549321000	Nitrogen attached directly or indirectly to the lactone ring by acyclic nonionic bonding	6
549323000	Chalcogen attached indirectly to the lactone ring by nonionic bonding	2
20100286414	Soot Dispersants and Lubricating Oil Compositions Containing Same - Linked aromatic compounds found to act as potent soot dispersants in lubricating oil compositions; lubricating oil compositions containing such soot dispersants and precursor compounds from which the soot dispersants are derived.	11-11-2010
20150018567	Cyclohexenone Compositions and Process for Making Thereof - Provided herein are processes of preparing cyclohexenone compounds useful for cancer treatments and/or diseases.	01-15-2015
549320000	Plural hetero rings	2
20120149921	TERTIARY ALCOHOL DERIVATIVE, POLYMER COMPOUND AND PHOTORESIST COMPOSITION - A polymer compound for a photoresist composition (a) having a high dissolution rate in a developing solution after exposure and (b) exhibiting little swelling during development. A tertiary alcohol derivative that is a raw material for the polymer compound. A tertiary alcohol that is an intermediate of the tertiary alcohol derivative. The tertiary alcohol is represented by formula (3):	06-14-2012
20130237711	INTERMEDIATES FOR THE PREPARATION OF ANALOGS OF HALICHONDRIN B - Intermediates and methods of their use in the synthesis of analogs of halichondrin B are provided.	09-12-2013
549322000	Having -C(=X), wherein X is chalcogen, bonded directly to the lactone ring	2
20100105929	PROCESS FOR THE PREPARATION OF y-BUTYROLACTONES - The present invention relates to a process for the preparation of γ-butyrolactones.	04-29-2010
20120323023	METHOD FOR PREPARING 4-AMINOBUT-2-ENOLIDES - Process for preparing 2,2-difluoroethylamine derivatives, wherein compounds of the general formula (IV) are reduced to the corresponding 2,2-difluoroethylamine derivatives of the general formula (III), where the A radical is as defined in the description:	12-20-2012
549324000	Halogen attached directly or indirectly to the lactone ring by nonionic bonding	1
20120264950	SYSTEM AND METHOD FOR CONTROLLING GROWTH OF MICROORGANISMS WITH BROMINATED FURANONES - A method for inhibiting the growth of a microorganism using an effective amount of one or more of the following synthetic brominated furanones: (i) 4-bromo-5Z-(bromomethylene)-3-methylfuran-2-one; (ii) 3-(dibromomethyl)-5-(dibromomethylene)furan-2-one; (iii) 3-(bromomethyl)-5-(dibromomethylene)furan-2-one; (iv) 4-bromo-3-(bromomethyl)-5Z-(bromomethylene)furan-2-one; or (v) 4-bromo-5-(dibromomethyl)-3-methylfuran-2(5H)-one. The brominated furanones inhibit the growth of both fungi and bacteria, including the fungal species	10-18-2012
549296000	Plural ring oxygens in the lactone ring	1
20160060242	METHOD FOR PRODUCING CATALYST FOR CYCLIC CARBONATE SYNTHESIS - Provided are: a method for easily producing a heterogeneous catalyst having excellent catalytic activity at a low cost, said heterogeneous catalyst being used for the purpose of synthesizing a cyclic carbonate by subjecting to a reaction an epoxide and carbon dioxide; a catalyst which is obtained by this production method; and a method for synthesizing a cyclic carbonate with use of this catalyst.	03-03-2016

Entries
Document	Title	Date
20090030213	Stabalized Vegetable Oils And Methods Of Making Same - A method for modifying ethylenic unsaturation in a triglyceride. One or more unsaturated fatty acyl moieties present in the triglyceride are substituted with a lactone or ketone moiety via a electron donor mediated reaction. The resulting reaction products are useful, for example, as formulations for lubricants, hydraulic fluids, dielectric fluids, and intermediates for polymer synthesis.	01-29-2009
20100121080	COPPER CATALYST FOR DEHYDROGENATION APPLICATION - Disclosed are catalytic compositions having from about 35% to about 75% of Cu by weight, from about 15% to about 35% of Al by weight, and about 5% to about 20% of Mn by weight. The catalytic compositions are bulk homogeneous compositions formed from extruding and calcinating a powder formed from a precipitation reaction of Cu(NO	05-13-2010
20110190513	METHODS, COMPOSITIONS AND SYSTEMS FOR BIOSYNTHETIC BIO-PRODUCTION OF 1,4-BUTANEDIOL - Three biosynthetic pathways are disclosed for microorganism bio-production of 1,4-Butanediol from various carbon sources. Exemplary methods are provided. The recombinant microorganisms comprising any of these 1,4-Butanediol biosynthesis pathways may also comprise genetic modifications directed to improved tolerance for 1,4-Butanediol.	08-04-2011
20120197030	STRUCTURE AND METHOD FOR SYNTHESIZING AND USING DIALKYL(2,4,6- OR 2,6-ALKOXYPHENYL)PHOSPHINE AND ITS TETRAFLUOROBORATE - The current invention relates to the structure, synthesis of dialkyl(2,4,6- or 2,6-alkoxyphenyl)phosphine or its tetrafluoroborate, as well as its applications in the palladium catalyzed carbon-chlorine bond activation for Suzuki coupling reactions and carbon-nitrogen bond formation reactions. The dialkyl(2,4,6- or 2,6-alkoxyphenyl)phosphine or its tetrafluoroborate could coordinate with the palladium catalyst to activate the inert carbon-chlorine bond highly selectively and catalyze Suzuki coupling reaction with arylboronic acid or carbon-nitrogen bond formation reaction with organic amines. The current invention uses only one step to synthesize dialkyl(2,4,6- or 2,6-alkoxyphenyl)phosphine and its tetrafluoroborate is stable in the air. Compared with known synthetic routes of ligands used in activating carbon-chlorine bonds, the method of current invention is short, easy to operate. Moreover, with this type of ligands, the Suzuki coupling products of optically active chlorolactones and arylboronic acids would maintain their configuration and optical purity.	08-02-2012
20130053582	PROCESS FOR THE ELECTROCHEMICAL PREPARATION OF GAMMA-HYDROXYCARBOXYLIC ESTERS AND GAMMA-LACTONES - γ-Hydroxycarboxylic esters and γ-lactones which are suitable as flavors can be prepared by electrochemical reductive cross-coupling of α,β-unsaturated esters with carbonyl compounds in an undivided electrolysis cell having a cathode composed of lead, lead alloys, cadmium, cadmium alloys, mercury, steel, glassy carbon or boron-doped diamonds and a basic aqueous electrolyte comprising an electrolyte salt which suppresses the cathodic formation of hydrogen.	02-28-2013
20140100376	PROCESS FOR THE ELECTROCHEMICAL PREPARATION OF GAMMA-HYDROXYCARBOXYLIC ESTERS AND GAMMA-LACTONES - γ-Hydroxycarboxylic esters and γ-lactones which are suitable as flavors can be prepared by electrochemical reductive cross-coupling of α,β-unsaturated esters with carbonyl compounds in an undivided electrolysis cell having a cathode composed of lead, lead alloys, cadmium, cadmium alloys, mercury, steel, glassy carbon or boron-doped diamonds and a basic aqueous electrolyte comprising an electrolyte salt which suppresses the cathodic formation of hydrogen.	04-10-2014
20160186073	METHODS AND SYSTEMS FOR PROCESSING CELLULOSIC BIOMASS - Separation of a product of digestion of cellulosic biomass solids may be challenging due to the various components contained therein. Methods and systems for processing cellulosic biomass, particularly a reaction product of a hydrothermal reaction containing lignin-derived products, such as phenolics, and organic salts, comprise providing acid solution to the organic salt containing process stream to convert the organic acid salts to acids to for further processing.	06-30-2016